Pinpoint Test D: The Speed Control Does Not Disengage When the Clutch Is Applied

Speed Control

Pinpoint Tests

Pinpoint Test D: The Speed Control Does Not Disengage When The Clutch Is Applied

Refer to Wiring Diagram Set 31, Speed Control for schematic and connector information. Diagrams By Number

Normal Operation

Vehicles equipped with a manual transaxle have an additional clutch pedal speed control deactivator switch. The PCM sends a signal through circuit CE904 (GN/VT) to the clutch pedal speed control deactivator switch. The return signal is sent to the PCM through circuit RE407 (YE/VT).

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Clutch pedal speed control deactivator switch
- PCM



PINPOINT TEST D: THE SPEED CONTROL DOES NOT DISENGAGE WHEN THE CLUTCH IS APPLIED

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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D1 CHECK THE CPP SWITCH (CPP_TOP) PID


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- While applying and releasing the clutch pedal monitor the PCM PID (CPP_TOP).
- Does the PID value agree with the clutch pedal position?

Yes
GO to D4.

No
GO to D2.

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D2 CHECK THE CLUTCH PEDAL SPEED CONTROL DEACTIVATOR SWITCH


- Ignition OFF.
- Disconnect: Clutch Pedal Speed Control Deactivator Switch C2354.
- Measure the resistance between the clutch pedal speed control deactivator switch C2354 pin 4, component side and the clutch pedal speed control deactivator switch C2354 pin 5, component side.




- Is the resistance less than 5 ohms with the clutch pedal released and greater than 10,000 ohms when the clutch pedal is pressed?

Yes
GO to D3.

No
INSTALL a new clutch pedal speed control deactivator switch. REFER to Speed Control Deactivator Switch Speed Control Deactivator Switch. CLEAR the DTCs. REPEAT the self-test.

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D3 CHECK CIRCUIT CE904 (GN/VT) FOR A SHORT TO GROUND


- Disconnect: PCM C175b.
- Measure the resistance between the clutch pedal speed control deactivator switch C2354-4, circuit CE904 (GN/VT), harness side and ground.




- Is the resistance greater than 10,000 between the speed control deactivator switch and ground?

Yes
GO to D4.

No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

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D4 CHECK FOR CORRECT PCM OPERATION


- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems Information. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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